/* Genel Ayarlar */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  background: #f7f8fa;
  color: #1c1c1e;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  background: #fff;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  z-index: 1000;
}

.nav-container {
  display: flex;
  align-items: center;
  gap: 50px;
  padding: 15px 40px;
}

.logo {
  font-size: 22px;
  font-weight: 700;
  color: #4facfe;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 25px;
}

.nav-links li a {
  text-decoration: none;
  font-weight: 600;
  color: #1c1c1e;
  transition: color 0.3s;
}

.nav-links li a:hover {
  color: #4facfe;
}

/* Hero */
.hero {
  background: linear-gradient(135deg,#4facfe,#00f2fe);
  padding: 60px 20px;
  border-radius: 20px;
  color: #fff;
  text-align: center;
  margin-bottom: 60px;
  box-shadow: 0 15px 40px rgba(0,0,0,0.2);
}

.hero h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 15px;
  line-height: 1.2;
}

.hero p {
  font-size: 18px;
  margin-bottom: 0;
  color: rgba(255,255,255,0.85);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Section Titles (Features / App Screenshots) */
.blue-gradient {
  background: linear-gradient(90deg,#4facfe,#00f2fe);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight:700;
  text-align:center;
  font-size:28px;
  margin-bottom:30px;
}

/* Features Section */
.feature-cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
}

.feature-card {
  background: #fff;
  border-radius: 20px;
  padding: 20px;
  width: 220px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  text-align: left;
  transition: all 0.3s ease;
}

.feature-card h3 {
  font-size: 18px;
  color: #4facfe;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: rgba(28,28,30,0.7);
}

.feature-card:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

/* App Screenshots */
.screenshots {
  margin-top: 80px;
  text-align: center;
}

.screenshot-gallery {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 20px;
}

.screenshot {
  width: 180px;
  height: 380px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #e0f7ff;
  border-radius: 20px;
  font-weight: 600;
  color: #4facfe;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  transition: all 0.3s ease;
}

.screenshot:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

/* App Subsections */
.app-subsection {
  padding: 50px 20px;
  margin-top: 40px;
  border-radius: 20px;
  color: #fff;
}

.workouts-bg { background: linear-gradient(135deg, #ff4c4c, #000); }
.nutrition-bg { background: linear-gradient(135deg, #28a745, #000); }
.sleep-bg { background: linear-gradient(135deg, #1a237e, #000); }
.mindfulness-bg { background: linear-gradient(135deg, #28a745, #000); }
.achievements-bg { background: linear-gradient(135deg, #ffca28, #000); }
.beam-bg { background: linear-gradient(135deg, #8e44ad, #000); }

.subsection-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 20px;
}

.sub-card {
  background: #fff;
  border-radius: 20px;
  padding: 20px;
  width: calc(33% - 13px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  color: #1c1c1e;
  text-align: center;
  transition: all 0.3s ease;
}

.sub-img {
  background: #e0f7ff;
  height: 150px;
  border-radius: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  font-weight: 600;
  color: #4facfe;
}

.sub-card:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

/* CTA */
.cta {
  padding: 60px 20px;
  background: linear-gradient(135deg,#3b9de0,#00c6ff);
  text-align: center;
  border-radius: 20px;
  margin-top: 60px;
  box-shadow: 0 15px 40px rgba(0,0,0,0.2);
}

.cta-title {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 15px;
  color: #fff;
  text-align:center;
}

.cta-text {
  font-size: 16px;
  margin-bottom: 15px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  color: #fff;
}

.cta-buttons .btn {
  color: #fff;
  padding: 14px 36px;
  font-size: 18px;
  font-weight: 600;
  border-radius: 12px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: all 0.3s;
}

.cta-buttons .btn:hover {
  transform: scale(1.05);
  background: #3b9de0;
  color: #fff;
}

.appstore-logo {
  width: 140px;
  height: auto;
}

/* About Developer */
.about-developer {
  background: linear-gradient(135deg, #1a1a1a, #2c2c2c); 
  padding: 60px 20px;
  border-radius: 20px;
  margin-top: 60px;
  color: #fff;
}

.about-developer .dev-container {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.about-developer .dev-image {
  flex: 1 1 40%;
}

.about-developer .dev-image img {
  width: 100%;
  border-radius: 20px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

.about-developer .dev-text {
  flex: 1 1 55%;
}

.about-developer h2 {
  font-size: 32px;
  margin-bottom: 20px;
  color: #fff;
}

.about-developer p {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 15px;
  color: #e0e0e0;
}

/* Footer */
footer {
  padding: 30px 20px;
  background: #1c1c1e;
  color: #fff;
  text-align: center;
  font-size: 14px;
  border-radius: 15px;
  margin-top: 40px;
}

footer a {
  color: #4facfe;
  margin: 0 5px;
  text-decoration: none;
  transition: color 0.3s ease;
}

footer a:hover {
  text-decoration: underline;
  color: #00f2fe;
}

/* Footer Sosyal Linkler */
.footer-socials {
  margin-top: 15px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
}

.footer-socials a {
  display: inline-block;
  transition: transform 0.3s ease, filter 0.3s ease;
}

.footer-socials a:hover {
  transform: scale(1.2);
  filter: brightness(1.2);
}

.footer-socials .social-icon {
  width: 28px;
  height: 28px;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .sub-card {
    width: calc(50% - 10px);
  }
}

@media (max-width: 768px) {
  .feature-cards,
  .screenshot-gallery,
  .subsection-cards {
    flex-direction: column;
    align-items: center;
  }

  .sub-card,
  .feature-card,
  .screenshot {
    width: 90%;
    margin-bottom: 20px;
  }

  .hero h1 { font-size: 28px; }
  .hero p, .cta p { font-size: 16px; }
  .cta .btn { width: 80%; padding: 12px 0; font-size: 16px; justify-content:center; }
}

@media (max-width: 600px) {
  .about-developer .dev-container {
    flex-direction: column;
  }

  .about-developer .dev-text,
  .about-developer .dev-image {
    flex: 1 1 100%;
  }

  .about-developer h2 {
    font-size: 28px;
    text-align: center;
  }

  .about-developer p {
    font-size: 15px;
    text-align: center;
  }
}